| Mont Dakota Utilities | Glendive | MT |
| Moulton Gold & Silver Mining | Butte | MT |
| Moulton Mining | Butte | MT |
| Mountain Bell | Billings | MT |
| National Mining | Helena | MT |
| New Mens Residence | Missoula | MT |
| North Butte Mining | Butte | MT |
| Northern Pacific Railroad | Livingston | MT |
| Northern Pacific Railroad | Glendive | MT |
| Northwestern Improvement | Chestnut | MT |
| Northwestern Improvement | Red Lodge | MT |
| Original Butte Mining | Butte | MT |
| Owens Corning | Billings | MT |
| Pack River Lumber | Thompson Falls | MT |
| Paper Mill & Digester | Missoula | MT |
| P.B. Moss | Billings | MT |
| Phillips Petroleum | Great Falls | MT |
| Phoenix Electric | Butte | MT |
| Pittsburgh & Montana Copper | Butte | MT |
| Plum Creek Lumber | Columbia Falls | MT |
| Ravalli County Courthouse | Hamilton | MT |
| Saint Gerard Catholic Church | Great Falls | MT |
| Saint Regis Paper | Libby | MT |
| Saint Vincent Hospital | Billings | MT |
| Saltenberger Plumbing & Heating | Anaconda | MT |
| Schmidt Plumbing & Heating | Missoula | MT |
| Sidney Montana Power Plant | Sidney | MT |
| Sierra Talc & Clay | Three Forks | MT |
| Smurfit-Stone Container | Missoula | MT |
| Stauffer Chemical | Butte | MT |
| Stauffer Chemical | Silver Bow | MT |
| Stone Container | Frenchtown | MT |
| Stone Container | Missoula | MT |
| Sunnyside Elementary School Gymnasium | Great Falls | MT |
| Ted Hall | Billings | MT |
| Texaco | Sunburst | MT |
| Thompson Falls Lumber Com | Thompson Falls | MT |
| Timber Butte Milling | Butte | MT |
| Union Oil | Cut Bank | MT |
| Union Tank Car | Laurel | MT |
| United Sierra Division | Three Forks | MT |
| United States Gypsum | Heath | MT |
| University Center | Missoula | MT |
| University Of Montana | Missoula | MT |
| Utah & Idaho Sugar | Chinook | MT |
| Van Evan | Missoula | MT |
| Victor Chemical | Butte | MT |
| Warm Springs State Hospital | Warm Springs | MT |
| Western Ranch Supply | Helena | MT |
| W.R. Grace | Libby | MT |
